EDR vs MDR: Do You Need the Tool, the Service, or Both?
Part of our guide: Choosing & working with an MSSP
EDR and MDR sound like variations on the same thing, and they’re related — but they’re not the same kind of thing. One is a tool you deploy; the other is a service that operates that tool for you. Confusing them leads to a common and expensive mistake: buying powerful software that nobody is actually watching.
EDR is the software
Endpoint Detection and Response (EDR) is security software that runs on your laptops, servers, and workstations. It goes well beyond traditional antivirus: instead of only matching files against a list of known-bad signatures, EDR watches behaviour — what processes run, what files change, what network connections open — and flags or blocks activity that looks like ransomware, credential theft, or an attacker living off legitimate tools.
EDR is excellent. But it’s a tool, and a tool generates alerts. Those alerts need someone qualified to read them, decide which ones are real, and act — at any hour. Buy EDR and leave it unmonitored, and you’ve installed an alarm that beeps into an empty room.
MDR is the service that runs it
Managed Detection and Response (MDR) is the human service layer. An MDR provider deploys and tunes the EDR (and usually more — cloud, identity, and network signals too), then provides the people to monitor it around the clock, investigate what it flags, and respond to confirmed threats.
In other words: EDR is the engine, MDR is the engine plus the driver. Most MDR services are built on top of an EDR platform — it’s the foundation the rest sits on.
EDR vs MDR at a glance
| EDR | MDR | |
|---|---|---|
| What it is | Software (a tool) | A managed service |
| What you get | Detection + alerts on endpoints | Detection, investigation, and response — done for you |
| Who watches it | You / your team | The provider’s analysts, 24/7 |
| Coverage | Endpoints | Endpoints + often cloud, identity, network |
| Good fit if | You have a security team to operate it | You don’t have one (or want them freed up) |
So which do you need?
It’s less either/or than it looks:
- You have no dedicated security staff. You need MDR. The EDR comes inside it — you don’t buy the tool separately, you buy the outcome.
- You have a mature, 24/7 security team. You might buy EDR on its own and run it yourselves. That’s a real choice for larger organizations with the headcount.
- You have some IT staff but no round-the-clock security coverage. This is most Canadian SMBs — and it’s the trap. You can afford the EDR licence, but you can’t realistically have a qualified human watching it at 3 a.m. MDR fills exactly that gap.
The question isn’t “EDR or MDR?” so much as “do I have the people to operate this tool every hour of every day?” If the answer is no, you’re buying the service, and the tool comes with it.
Our Managed Detection & Response service is built on a leading EDR platform with our analysts operating it for you. Want to see how that maps to your setup? Talk to our team.